#include<bits/stdc++.h>
using namespace std;
int main(){
    int m,n;
    cin>>m;
    if(m>10) n=3*25*5;
    else if(m>=7) n=3*5*15; 
    else n=3*5*5;
    if (n%120==0) cout<<n/120;
    else cout<<n/120+1;

    
    
    
	return 0;
}

/**************************************************************
	Problem: 1310
	User: LYY001
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/